[PATCH 1/15] ptwalk: p?d_none_or_clear_bad

Replace the repetitive p?d_none, p?d_bad, p?d_ERROR, p?d_clear clauses by pgd_none_or_clear_bad, pud_none_or_clear_bad, pmd_none_or_clear_bad inlines throughout common and i386 - avoids a sprinkling of "unlikely"s. Tests inline, but unlikely error handling in mm/memory.c - so the ERROR file and

[PATCH 1/15] ptwalk: p?d_none_or_clear_bad

Replace the repetitive p?d_none, p?d_bad, p?d_ERROR, p?d_clear clauses by pgd_none_or_clear_bad, pud_none_or_clear_bad, pmd_none_or_clear_bad inlines throughout common and i386 - avoids a sprinkling of unlikelys. Tests inline, but unlikely error handling in mm/memory.c - so the ERROR file and